
<h1><span class="yiyi-st" id="yiyi-12">numpy.union1d</span></h1>
        <blockquote>
        <p>原文：<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.union1d.html">https://docs.scipy.org/doc/numpy/reference/generated/numpy.union1d.html</a></p>
        <p>译者：<a href="https://github.com/wizardforcel">飞龙</a> <a href="http://usyiyi.cn/">UsyiyiCN</a></p>
        <p>校对：（虚位以待）</p>
        </blockquote>
    
<dl class="function">
<dt id="numpy.union1d"><span class="yiyi-st" id="yiyi-13"> <code class="descclassname">numpy.</code><code class="descname">union1d</code><span class="sig-paren">(</span><em>ar1</em>, <em>ar2</em><span class="sig-paren">)</span><a class="reference external" href="http://github.com/numpy/numpy/blob/v1.11.3/numpy/lib/arraysetops.py#L406-L439"><span class="viewcode-link">[source]</span></a></span></dt>
<dd><p><span class="yiyi-st" id="yiyi-14">查找两个数组的并集。</span></p>
<p><span class="yiyi-st" id="yiyi-15">返回两个输入数组中任一个中唯一的已排序数值组。</span></p>
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<tr class="field-odd field"><th class="field-name"><span class="yiyi-st" id="yiyi-16">参数：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-17"><strong>ar1，ar2</strong>：array_like</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-18">输入数组。</span><span class="yiyi-st" id="yiyi-19">如果他们还没有1D，它们是扁平的。</span></p>
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<tr class="field-even field"><th class="field-name"><span class="yiyi-st" id="yiyi-20">返回：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-21"><strong>union1d</strong>：ndarray</span></p>
<blockquote class="last">
<div><p><span class="yiyi-st" id="yiyi-22">输入数组的唯一的已排序联合。</span></p>
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<div class="admonition seealso">
<p class="first admonition-title"><span class="yiyi-st" id="yiyi-23">也可以看看</span></p>
<dl class="last docutils">
<dt><span class="yiyi-st" id="yiyi-24"><code class="xref py py-obj docutils literal"><span class="pre">numpy.lib.arraysetops</span></code></span></dt>
<dd><span class="yiyi-st" id="yiyi-25">具有用于对数组执行设置操作的多个其他功能的模块。</span></dd>
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<p class="rubric"><span class="yiyi-st" id="yiyi-26">例子</span></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">union1d</span><span class="p">([</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">],</span> <span class="p">[</span><span class="o">-</span><span class="mi">2</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="p">])</span>
<span class="go">array([-2, -1,  0,  1,  2])</span>
</pre></div>
</div>
<p><span class="yiyi-st" id="yiyi-27">要找到两个以上的数组的并集，请使用functools.reduce：</span></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">from</span> <span class="nn">functools</span> <span class="k">import</span> <span class="n">reduce</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">reduce</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">union1d</span><span class="p">,</span> <span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">3</span><span class="p">],</span> <span class="p">[</span><span class="mi">3</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">],</span> <span class="p">[</span><span class="mi">6</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">2</span><span class="p">]))</span>
<span class="go">array([1, 2, 3, 4, 6])</span>
</pre></div>
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</dd></dl>
